Grease-gun.



8.1 ROGNLIE. GREASE GUN. APPLICATION FILED MAR. 26. 1914.

Patented. July 17, 1917.

glvwmflo'c affozucq SEVERIN' J. ROG-ELIE, 0F MINO'JL, NORTH DAKOTA.

GREASE-GUN. I

Specification of Letters Patent.

Patented deny it, 11W.

Application filed March 26, 1914. Serial No. 827,403.

To all whom it may concern:

Be it known that I, SEVERIN J. RoGNLIE,

a citizen of the United States of America,

residing at Minot, in the county of Ward and State of North Dakota, have invented certain new and. useful Improvements in Grease-Guns, of which the following is a specification, reference being had therein to" the accompanying drawing.

This invention relates to grease guns and the principal object of the invention is to provide a grease gun which may be filled through an opening formed in the side and i to provide a novel type of latch for the plunger so that the plunger may move through the cylinder either by pushing the plunger or by turning it.

With the above and other objects in view, the invention consists in general of certain novel constructions, combinations and arrangements of parts, as will be hereinafter fully described, illustrated in they accompanying drawings, and specifically claimed.

In the accompanying drawings like characters of reference. indicate like parts in the several views, and

Figure l is a side elevation 6f the grease gun with the sleeve turned to open the side opening.

Fig. 2 is a section along the line 22, Fig. I with the sleeve turned to close the side opening.

Fig. 3 is an enlarged sectional viewthrough the end portion of the gun with the pawl in a position to engage the threads of the plunger. Fig. 4 is an end elevationof the gun 'wlth the plunger shown in section.

Fig. 5 is a view similar to Fig. 4 wlth the collar turned in a position to bring the pawl.

out of engagement with the plunger ro'd.

Fig. 6 is a fragmentary .perspectlve new of the end of the grease gun with the collar removedand the plunger shown in section. Fig. 7 is a perspective view of the pawl. Fig. 8 is a perspective view of the collar. Fig. 9 is a perspective view of the liner.

' Fig. 10 is a fragmentary view of the cylinde Fig. 11 is a sectional view through the piston mounted upon the inner end of the plunger.

Figs. 12 and 13 show details of the plunger feed mechanism.

Referring to the drawings it will be seen that this in ention comprises a cylinder, 10

' which is provided with a longitudinally extending opening 11 which is closed by a sleeve 12 provided with a longitudinally ex- "tending opening 13 of the same width as the opening 11 but of less length. It should ,be

noted that the ends of the opening 11 are elongated curves so that, the plunger will slide past the opening without being rolled out of shape. The sleeve. 12 is mounted upon the cylinder 10 between the enlarged ends 14 and 15 and is provided with the roughened strips 16. The enlarged end portions 14 and 15 are also roughened as will' be seen in Fig. 1 so that by grasping the end 14 with one hand and grasping the roughened strips 16 with the other hand the sleeve may readily be turned to bring the openings 11 and 13 into and out of registry.

A neck 17 extends from the enlarged end 14 and is provided with a longitudinally extending slot 18 from the OPPOSltGSldGS of which there extends pivot bearings. A liner 20 is fitted within the neck 17 and is provided with a notch 21 formed in alinement with the slot 18. The pawl shown in Fig. 7 isprovided with the thickened por grooves 19 which form tion 22 from which there extends the pivot pin 23 and is provided with the .thickened end portions 24 and25, the end portion 24 forming a bearing by means of which the pawl-may rock upon its pivots and the end 25 forming claws which engage the threads of a plunger which will be hereinafter described. Grooves 26 are formed near the end 25 in the opposite face of the pawl and form seats in which 27 of the spring fits. This spring passes through the end 14 and has its innerend portion bent to form an extension which is seated in the liner 20.

A threaded plunger 29 passes through the liner 20 and has its inner end passing through the center of the compressing ring 30. It should be noted that the compressing ring is rotatably mounted upon the end of the plunger so that when the plunger is rotated the compressing disk will not rotate but will be drawn through the cylinder by a straight pulling motion. A collar 31 is mounted upon the neck 17 and has its central opening cut to form a cam surface 32 the outer end portion groove 28 formed in the the bearings 19 and its. end 25 passing through the opening 21 where it is held in engagement with thethreads of the plunger by'means of the spring 27, the collar 31' is placed upon the neck and the end 24 of the pawl will be held in the path of the shoulder 33 thus limiting the rotary motion of the collar in one direction. 'When the collar is turned in the opposite direction, the cam face 32 presses the end 24 of the pawl into the slot 18, thus rocking the pawl upon its of t e collar 31 for the purpose of producing the shoulder 34 against which the spring 27 is adapted to abut.

It willthus be seen that although the collar is, rotatably mounted that this rotary movement is limited by the shoulders 33 and 34 coming into contact with the pawl and spring. It should be noted that the liner 20 is provided with a flattened face 35 which extends from the'inner end of the notch 21 and forms a bearing face for the pawl when the pawl is rocked to release the plunger.

- A washer 36 is secured to the neck 17 and prevents the liner and the collar from slipping out of position when the grease gun is in use.

The opposite end of the grease gun is provided with a threaded extension 37 in which the pawl so that it there is mounted a spout 3.8. It is, of course, obvious that if it is desired to feed the grease very rapidly or in a large quantity that the spout used without the same.

When using the device the collar is turned to the position shown in Fig. 5 so that the plunger will be released from the pawl and the plunger then drawn out as far as possible. The sleeve 12 is then turned to bring the openings 11 and 13 into alinement as shown in Fig. 1 and this leaves an opening through which grease may be poured or if the grease is solid may be inserted by means of a suitable paddle.

After the cylinder is filled with grease the sleeve is turned to close the opening 11 and, the gun is then ready for use. If the grease is thin the collar is left as shown in Fig. 5 and the handle 39 of the plunger'is grasped and the plunger thrust into the cylinder until the desired amount of grease has been forced out through the spout 38. If the grease is thick the collar is turned to the position shown in Fi 4 and this releases W111 engage the threads may be removed and the gun the threads of said of the plunger thus making it possible to force the plunger through the cylinder by turning it and converting the gun from a forced feed into a screw feed.

It should be noted, however, that after the collar has been turned to the position shown in Figs. 3 and 4 if it is desired to force the plunger through the cylinder by a direct 've, this may be accomplished without turning the collar to the position shown in Fig. 5 since the threads of the plunger can ride past the pawl. After the plunger has been driven through the cylinder the full 'extent it cannot be withdrawn by a straight pull unless the collar is turned to the position shown in Fig. 5, thus releasing the pawl from engagement with the teeth of the plunger. 5

It will thus be seen that there has been provided an improved type of locking pawl which is so constructed that the plunger may be thrust through the cylinder to drive out the grease when the locking pawl is in either of two positions but which will hold the plunger within the cylinder when the pawlis in one position so that in order to Withdraw the plunger it is necessary to turn the plunger.

The compressing ring which forms the piston for the gun comprises the plates 40 and 41 which are mounted upon the thread ed shaft 42 having the enlarged head 43, a

leather cup 30 being held between the plates. A securing nut 44 is screwed upon the shaft and holds the plates tightly in place. The reduced inner end 46 of the plunger 29 is passed through the shaft 42 and the piston held thereon by the key 47. It will thus be a seen that the plunger can rotate without the piston being rotated.

Having thus described the invention, what is claimed as new, is

1. A lubricator comprising a cylinder, a neck leading from said cylinder, and vided with a slot, a liner positione said neck and provided with a notch registering with said slot, athreaded plunger passing through said liner, a pawl pivotally connected with said neck, a spring engaging said pawl normally holding said inner end in engagement with the threads of said plunger, and a collar rotatably mounted upon said neck and having the walls of its central opening formed into a cam surface to rock said pawl out of engagement with plunger upon the tuming of said collar.

2.-A lubricator comprisin a cylinder, a neck extending from saidcy nder and rovided with a slot having notches forme to each side forming pivot sockets, a threaded plunger passing through said neck, a pawl mounted in said slot, pivot points carried by said pawl and positioned in said bearings, a spring carried by said cylinder and I having its outer end engaging said pawl to awl in plunnor'mally hold the inner end of said engagement with thethreads of sai ger, a collar mounted upon said neck and having the walls of" its central opening cut to form a cam face adapted 'to rock said pawl out of engagement with said plunger,

said cam face terminating in an abutment shoulder adapted to contact with the outer end of said pawl to limit the rotary motion of said collar in one direction, the inner end of said collar being out to form an abutment shoulder adapted to contact with the end of said spring to limit the rotary movement of said pawl in the opposite direction.

3. A lnbricator comprismg a cylinder, a neck extending from said cylinder and provided with a longitudinally extending slot,

a liner positioned within said neck and provided with a notch registering with said slot, a pawl ivotally mounted in said-slot and having 1ts inner end passing through said notch, aplunger passing through said liner and adapted to be engaged b said pawl, a collar mounted upon said nec and adapted to be rotated whereby to rock said pawl out of and into engagement with said plunger, and a plate surrounding said plunger and secured to the outer end of said neck whereby said liner and collar will be held in place.

4. A lnbricator comprising a cylinder, a neck extending from said cylinder and pro-' vided with an opening, a threaded plunger passing through said neck, a pawl mounted upon said neck and mormally'held in a position to extend through said opening and engage said plunger, and a collar rotatably mounted upon said neck and provided with list pawl through said opening and into engagement with said plunger whereby said plunger may be moved into said cylinder by turning and by pushin to ride over the threa s of said plunger, and means for moving said pawl out of engagement with said plunger to permit said plunger to be drawn out of sald cylinder, said pawl normally preventing saidv lunger from being drawn from said cylin er and permitting the plunger to be removed by turning.

6. A lnbricator comprising a cylinder providedwitlr a longitudinally extending elliptical opening, a sleeve rotatably mounted upon said cylinder and provided with a longitudinally extending opening of approximately the same width and of less length than the opening of said cylinder, the end portions of the opening-in said sleeve being cut square, and an expelling plunger extending into said cylinder.

In testimonywhereof I hereunto aifix my signature in presence of two witnesses.

SEVERIN J. ROGNLIE.

Witnesses:

.RoBERT S. GILLESPIE,

ALFRED S. BLAKEY.

to cause the pawl 

